Chemical weed management in soybean with early post-emergence herbicides Das Sanjib Kumar, Samui Suman* Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, 741252, India *Corresponding author email: sumansamui369@gmail.com
Online Published on 28 October, 2024. Abstract In soybean, weed control has proven to be particularly difficult during rainy (Kharif) season because of erratic precipitation, unusable soil on rainy days, and a shortage of labour. Under such conditions, using superior broad-spectrum herbicides is the only other viable way to suppress weeds. Thus, field experiments were conducted to study the effects of ready-mix early post emergence herbicides on soybean crop at research farm of Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal during the Kharif season of 2020 and 2021. Seven treatments consisted of three doses of early post-emergence ready-mix herbicide fluazifop-p-butyl 11.1% + fomesafen 11.1% SL at 250, 312.5 and 500 g/ha, other post emergence herbicide such as quizalofop-ethyl 5% EC (50 g/ha) and imazethapyr 10% SL (100 g/ha), and hand weeding at 20 and 40 DAS and weedy check control were laid out in randomized complete block design with three replications. Fluazifop-p-butyl 11.1% + fomesafen 11.1% SL (312.5 g/ha) found effectively to control all types of weed and dry weight and increased seed (2.41 t/ha) and stover (2.73 t/ha) yield significantly by improving growth and yield attributing characters which were at par with the twice hand weeding. The highest dose of fluazifop-p-butyl 11.1% + fomesafen 11.1% SL (500 g/ha) were found to be superior against weed flora but caused phytotoxicity on crop and reduced seed (1.58 t/ha) and stover yield (2.15 t/ha). Top Keywords Early post-emergence herbicides, Fluazifop-p-butyl + fomesafen, Hand weeding, Seed yield, Soybean. Top |